So Soon Hyeong, Jang Jun Ho, Sung Sae Jin, Yang Seung Jae, Nam Ki Tae, Park Chong Rae
Carbon Nanomaterials Design Laboratory, Research Institute of Advanced Materials, Department of Materials Science and Engineering, Seoul National University Seoul 08826 Republic of Korea.
Department of Materials Science and Engineering, Seoul National University Seoul 08826 Republic of Korea.
Nanoscale Adv. 2019 Oct 14;1(12):4697-4703. doi: 10.1039/c9na00501c. eCollection 2019 Dec 3.
Ammonia borane (AB, NHBH) is a highly promising hydrogen storage material, but its high dehydrogenation temperature hinders its wide use in practice. The infiltration of AB into the pores of porous materials can lower the dehydrogenation temperature by what is known as the nanoconfinement effect. Nonetheless, it is unclear as to whether this phenomenon stems from a catalytic effect or the nanosize effect. In this work, carbon nanomaterials with a uniform pore size and with inertness to AB were chosen as nanoscaffolds without catalytic sites to control the particle size of AB. It is proved experimentally that the dehydrogenation temperature of AB is inversely proportional to the reciprocal of the particle size, which means that the nanoconfinement effect can be caused solely by the nanosize effect without a catalytic effect.
氨硼烷（AB，NHBH）是一种极具前景的储氢材料，但其较高的脱氢温度阻碍了它在实际中的广泛应用。将AB渗入多孔材料的孔隙中可通过所谓的纳米限域效应降低脱氢温度。然而，尚不清楚这种现象是源于催化效应还是纳米尺寸效应。在这项工作中，选择具有均匀孔径且对AB呈惰性的碳纳米材料作为无催化位点的纳米支架，以控制AB的粒径。实验证明，AB的脱氢温度与粒径的倒数成反比，这意味着纳米限域效应可能仅由纳米尺寸效应引起，而不存在催化效应。
